Willow Go breast pump with 21mm and 24mm flanges. The left side unit operates. The right does not. I am selling both for the price of one side and perhaps the right can be reset or replace battery unit. All the accessories are included that way. The right unit was submerged in water. I just used the left for both sides afterwards which worked fine for me me. The 21mm flanges are brand new. The pump itself was only used for the month I was weaning. Charging cables included.